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Cast iron submersible sewage pump with vertical float switch and 2 inch discharge

Dayton

Dayton 4LB99 1 HP 2" Auto Submersible Sewage Pump 230V Vertical Trap

SKU CH-KTR9-BXPAQ MPN 4LB99

1 HP submersible sewage pump handles 2‑inch solids and delivers up to 195 gpm at 10 ft head

  • TypeDrain Components
  • 1 HP motor powers heavy sewage loads
  • 230 V single-phase supply suits residential and light-commercial sites
  • Vertical float switch starts and stops the pump automatically
  • Cast-iron body and impeller resist corrosion and abrasion
  • 195 gpm at 10 ft head moves high volumes quickly

1 HP Submersible Sewage Pump

The Dayton 4LB99 is a 1 HP automatic submersible sewage pump rated for 200 to 240V AC single-phase operation. It uses a PSC motor drawing 8.30 amps and features a 2-inch discharge capable of passing solids up to 2 inches in diameter. This unit suits residential or light commercial waste removal where gravity drainage is not possible.

Flow Rates at Specific Head Heights

Performance is defined at three total dynamic head points: 195 gpm at 10 ft, 165 gpm at 15 ft, and 130 gpm at 20 ft. The pump will not achieve these flow rates at higher head pressures, so system designers must match the discharge piping and static lift to these curves. Buyers needing higher flow at greater head should verify these figures against their system requirements before purchase.

Cast Iron Construction with Vertical Float Switch

The pump body and impeller are both cast iron with a silicon carbide shaft seal for abrasion resistance. A vertical float switch with piggyback electrical connection provides automatic level control without a separate control panel. The 16 3/4 inch body diameter requires a basin large enough to accommodate the float swing. Installers should confirm basin dimensions and chemical compatibility with the Prop 65-listed materials.

Highlights

  • 1 HP motor powers heavy sewage loads
  • 230 V single-phase supply suits residential and light-commercial sites
  • Vertical float switch starts and stops the pump automatically
  • Cast-iron body and impeller resist corrosion and abrasion
  • 195 gpm at 10 ft head moves high volumes quickly

Specifications

TypeDrain Components
BrandDayton
Model4LB99

Questions about this item

Which capacity should I choose for a typical residential sewage basin?

The pump moves 195 gpm at 10 ft of head, 165 gpm at 15 ft and 130 gpm at 20 ft; match the basin size and pipe run to the head you expect.

What does the 1 HP rating mean for actual flow in my system?

At 230 V the motor draws 8.30 A and delivers up to 195 gpm at 10 ft of head, dropping to 130 gpm at 20 ft of head.

How does the 2 inch discharge and vertical float switch limit installation options?

The 2 in discharge handles solids up to 2 in diameter; the piggyback vertical float switch requires enough vertical clearance in the basin for the float to rise and fall freely.

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